Core-molding apparatus.



H. W. BRAGKEN. QORE MOLDING APPARATUS., APPLICATION FILED JAN. 20.. 1908.

- 900,054, I j Patented Sept. 29,1908.

2 SEBETSSHEET 1.

v C I fiwardZdBrwakam I H. W. BRACKEN.

GORE MOLDING APPARATUS. APPLIOATIONIILED JAN. 20, 1909.

Patented Sept. 29

2 SHEETS-SHEET 2.

I Iver/awn 1 v .ZfowaraZZdBrwaEem UNITED STATES PATENT OFFICE.

HOWARD W. BRAOKEN, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY,

OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

CORE-MOLDING APPARATUS.

Specification of Letters Patent.

Patented Sept. 29, 1908.

Application filed January 20, 1908. Serial No. 411,581.

To all whom it may concern:

. Be it known that 1, HOWARD W. BRAOKEN,

a citizen of the United States, and resident of Hopedale, county of Worcester, State of I Massachusetts, have invented an Improvement in (lore-Molding Apparatus, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawing representing like parts. I

This invention has for its object the production of apparatus for making simultaneousl y a series of cores for use in metal founding, the construction and arrangement being such that the cores, when molded, can be re moved or stripped from the core-box or molding device with ease and rapidity, all of the cores being removed at once. I

By means of this invention l obviate handling of the cores unnecessarily besides greatly facilitating the making of'the same.

The various novel features of my invention will be fully described in the subjoined specification and particularly pointed out i1 t 1e following claims. a Figure is a side elevation of core-molding apparatus embodying one fOIlll of my inventlon, set up in readiness for the melding of the cores; Fig. 2 is an elevation, partly broken out, of a suitable form of machine for removing or stripping the cores when made; Fig. 3 is a top plan view of the core-molding box shown in Fig. l Fig. 4 is an end elevation of the core-box, reversed and set in the machine shown in Fig. 2, in readiness to strip the cores from the box. Fig. 5 is an enlarged vertical sectional detail through a portion of the coremolding box, showing the top-plate in place and several cores in the molds; Fig. 6 is a top 40 plan View; and Fig. 7 a side elevation, )artly in section, of a n'iodified form of core-- box, to be referred to.

1 will first deserilm the apparatus for mold ing double-tapcn' cores in accordance with my invention, the cores to be made having elongated bodies of the same cross section throughout, and tapered at each end l A two-part mold is required for such corcs,'and

' inthe present embodiment of my invention '50 it comprehe uls a core-box proper, shown at 1, preferably made .of cast iron, having formed in it a group or series of open-ended be described.

core-molds each having an elongated body 2 and a tapered end 3, Fig. 5, the bodies being in this instance cylindrical. The larger ends of the bodies are flush with the top face 4 of the core-box, and upon this face is laid the second. member of the mold, consisting of a top-plate 5 having a series of tapered openings 6, the openings being undercut so that when the top-plate is applied to the box 1 the said openings will register with the upper ends of the mold bodies 2, as shown in Fig. 5. It will be understood that the axes of the molds in the core-box 1"are arallel to each other, and at right angles to t 1e top and bot tom faces of the box, and the centers of the tapered holes 6 register with such axes. The top-plate has handles 7 by which it may be moved about, and its thickness depends upon the length of the tapered ends of the cores. Positioning ins 8, Fig. 3, formed on the core-box, enter fioles in the top-plate, to accurately fix the latter in place.

Laterally extended supports or wings 9 are formed integral with the box 1 on opposite sides, near its top face, the wings being strengthened by \vebs. 10, the supporting faces of the wings being in a ilane slightly higher than .the top face 4 of the box, as shown in Fig. 1. Each wing has formed upon it two stops 1], 12, near the corners of the box but outside the top-plate area, as shown in l i.g. the faces of the supports being in a plane parallel to the topface of the box and. at a distance therefrom equal to the thickness of the top-plate, for a purpose to One stop, as 11., of each pair, has an upstanding lug or pin 1.3, which is of use after the top-plate is removed, as will be v explained.

The top-plate positioned on the top of the core-box, and the latter is placed upon a bottom-board 14, Fig. 1, having longitudinal ribs 15 on its under side, the board being placed on the topof a shaking or jigging machine B, Fig. 1, forming no part of this invention, the machine having a vertically reciprocated vibrating plunger b, actuated by any suitable motive power. The plunger strikes the under side of the bottom-board with a series of rand, quick taps, and the moldin sand shove led onto the top plate by the mo der shaken down into the molds and compacted b the vibrations im arted to the core-box t rough the bottomoard. No pounding or com ression of the sand is necessary with this s akin machine, as the damp sand compacts quiefily and firmly so that the cores will retain their shape when drawn or stripped from the molding device.

When the molds are filled the surplus sand is scraped off, the molder lifts up and re moves the top-plate 5, leaving the tapered ends a of the cores exposed above the to of the core-box 1. The core-box is now l' ted from the bottom-board 14, and the latter is placed upon the top of the box, the pins 13 entering holes made in the board, whereupon the board and core-box are reversed, see Fig. 4, the )rojecting ends of the cores resting upon the bottom-board, bu t the entire weight of the core-box is sustained by the stops 11 and 12, the flat faces thereof resting squarely upon the bottom-board, any tendency to crush the exposed ends 0 of the cores being thus absolutely obviated. The bottom-board with the filled core-box is now F taken to a molding machine of suitable character, such as shown in United States Patent No. 714285, granted November 25, 1902 to Day and Anderson, a machine of this charac ter being, shown in Fig. 2 and partly in Fig. 4. The ends A of the rigid frame support parallel heads A}, between which is located a ver ic'ally-movable carrier having connected up ight arms (1 provided with T-shaped heads C, the carrier sliding on vertical guides A Fig. .2. llerein l have built up the heads A by bars 16, one of them having upturned pins 17, to cooperate with notches 18, Fig. 3, in one of the wings 9. have substantially L-shaped members 1!) attached thereto, their lateral portions being 7 inturned as shown in Fig. 4, and at a lower level than the tops of the bars Hi When the carrier is elevated to its full height. When the reversed core-box and bottom-board are placed on this machine the ribs 15 of the ward rest upon the members 19 while the wings 9' are just above the tops of the bars 16, the pins 17 in the slots 18 properly positioning the core-box in the machine. The operator now turns the handle d to lower the carrier and by so doing the wings of the corebox descend and rest on the bars 16, while the bottom-board 14. moves down with the carrier, drawing or stripping the group of cores from the box 1, as will be manifest.

()rdinaril the cores will leave the box cleanly itllt easily without assistance, but should it be advisable to tap the COXO-lHJX a vibrator V, Figs. 1 and 35, of well-known construction can be attached to a flan e or rib 20 on the core box, provided for that purpose.

The cores having been withdrawn from the core-box the latter is lifted off and the carrier The carrier-howls (1 is elevated, so that the molder can take away theAbottom-board with the group of cores standing thereon obviatingany handling of the cores during the entire operation.

If cores having one end tapered are to be made the top-plate 5 is omitted in molding the cores, and the operations previously described are carried out, exce t that a filling board would have to be placed on the bottomboard, the thickness of the filling board being equal to the depth of the stops 11 and 12, as Wlll be manifest.

Sometimes the cores are of the same crosssection from end to end, and in such case a core-box such as shown in Figs. 6 and 7v is used, the box 21 haviiu a series of o err-ended core-molds 22 made therein, the ox being seated on the bottom-board 14 during the melding of the cores. Ribs 23 are formed on the box at its ends to serve as handles, and vibrator-attachin r ledges 24 are also provided nearer theliottom of the box, to support a vibrator V, Fi 6. The box is also provided with laterally-extended wings 225, on its opposite sides adjacent its bottom, one of said wings being notched as at 26. When the cores are molded the box and bottomboard are transferred to the machine shown in Fig. 2, or a similar machine, the wings resting on the bars 16 and the ribs 15 of the bottom-board are sup )OIbGd on the members 19 on the carrier-heads. The pins 17 cooperate with the notches 26 to position the core-box. By lowering the carrier as before the bottomboard descends and the cores move with it, being drawn out of the core-box while the latter is held stationary.

'lhe handling of cores is objectionable as there is great danger of injuring them, and the molding of the cores in two-part molds having the parting face intersecting the longitudinal axes of the cores requires iandling,

while the operation is slow as only a few-cores can be made at a time. The handling is entirely obviated by my invention and the rapidity of manufacture is greatly increased, fora large number of cores can be made at one time and all simultaneously stripped or removed from the molds, without coming in contact with the hands of the workman.

From the foregoing description it will be manifest that by means of my novel apparatus l. am emtbled to make the cores absolutely circular in cross section, without any side iins. Where cores are made by the use of split or separable boxes it is impossible to prevent the formation of side fins on the cores, along the arting faces of the box parts. ll erein, where the wall of each coremold is continuous from one end of the core to the other there is nothing which can prod uce a fin and the cores are perfectly round and absolutely smooth as a consequence.

Having fully described my invention, what I claim as new and desire to secure by-Letthe box to sustain a vibrator;

2. A two-part core-box comprising a box pro er having a series of open-ended molds eac comprising an elongated bodyportion having the same cross-section throughout and a tapered end, a removable top part having tapered openings to register with the larger ends of the molds and thereby complete the molds'for double-taperedicorea.

idly connected with, the box and stops ri and having t eir faces in a plane parallel to the top of the box and at a distance therefrom equal to the thickness of the removable top part.

I 3. In'apparatus of the class described, a box havin a series of open-ended core-molds tapered a one end, a top-plate having'tapered openings, to form the opposite tapered" ends of the core-molds when thelate is laid upon the top of the box, lateral-y extended wmgs on the box near its top, and stops on said wings havin their faces 1n a plane parallel to the top 0 the box and at a distance therefrom equal to the thickness of the topplate, to sustain the box when'reversed after the tolp-plate is removed. 4. n

apparatus of the classdescribed, a metallic box having a series of open-ended core-molds with cylindrical bodies and tapered at one end, a removable top-plate having-tapered openings to register with the larger ends-of the mold-bodies and form tapering ends thereat, and stops rigidly connected with the box and having their faces in a plane parallel to the top of the box and at a distance therefrom equal to the thickness of the top-plate. 5. In apparatus of the class described, a metallic box having a series of open-ended core-molds with cylindrical bodies and ta' ered, at one end, a removable top plate havmg tapered openings to register with the larger'ends of the mold-bodies and form tapering ends thereat, and stops rigidly connected with the box and having their faces in a plane parallel to the-top of the box and at a distance therefrom .equal to the thickness of the top-plate, two of thestops dia onally opposite having positioning pins, an a bottomoard having sockets to receive the pins when the topate is removed and the ox is reversed, the bottom-board supporting the projecting ends of the cores while the itops rest upon the board and sustain the ox. e Y

In testimony whereof, I have signed my name to this specification, in the presence of twosubscribing witnesses.

HOWARD W. BRACKEN.

Witnesses:-

ALEXANDER-P. DAVIS, EDWARD DANA Oseooi). 

